Though i think the Mexican character was purposefully over the top, same as the British guy, using an exagerated accent that leveled off after the reveal and during the flash back

Besides Goggins and Jennifer Jason Leigh, who both knocked it out of the park, this movie was waaaaay too long and not memorable. Im guessing Tarantino was jerking off while he inserted the N word into every sentence of dialogue. The "in historical context" thing is getting old. Wasnt needed in this movie.